CN103008914B - Chromium oxide green 308 austenitic stainless steel metal core welding stick and preparation method thereof - Google Patents
Chromium oxide green 308 austenitic stainless steel metal core welding stick and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a chromium oxide green 308 austenitic stainless steel metal core welding stick and a preparation method thereof, and the welding stick and the preparation method thereof belong to the technical field of welding materials. The chemical components of the powder of a metal core are as follows: 0.03 weight percent to 0.065 weight percent of carbon (C), 52 weight percent to 58 weight percent of chromium (Cr), 26 weight percent to 30 weight percent of nickle (Ni), 4 weight percent to 6 weight percent of manganese (Mn), 0.66 weight percent to 1.5 weight percent of silicon (Si), 0.5 weight percent to 1 weight percent of titanium (Ti), 0.5 weight percent to 1 weight percent of zinc (Zn), 0.5 weight percent to 1 weight percent of zirconium (Zr), less than 0.03 weight percent of phosphorus (P), less than 0.03 weight percent of sulfur (S) the rest of ferrum (Fe). The filling rate is 26 percent to 38 percent. According to the chromium oxide green 308 austenitic stainless steel metal core welding stick and the preparation method thereof, under the condition of a little smaller amount of welding dust, the emission of toxic Cr (VI) can be reduced by 30 percent to 40 percent compared with the solid welding stick of the same type, and by 35 percent to 45 percent compared with a stainless steel flux-cored welding stick. Due to the adoption of the low-carbon steel strip, the cost of the welding stick can be greatly reduced, the welding stick has stable welding arc and little splash, a formed welding seam is attractive, and the comprehensive properties of deposited metal are excellent.
Description
Technical field
The invention belongs to technical field of welding materials, particularly a kind of low Cr VI (Cr(VI)), the 308 austenitic stainless steel metal core welding wires of gas shield cheaply.
Background technology
In stainless steel welding process, inevitably will produce pernicious gas and flue dust, it directly affects the healthy of the protection of environment and welder.Meanwhile, stainless flux-cored wire is made by 304L stainless steel belt rolling drawing, and stainless steel band cost is higher.
The present invention be development a kind of low Cr VI (Cr(VI)), low-cost austenitic stainless steel metal core welding wire, in stainless steel extensive use, focus on again today of environment-friendly type, Cr(VI in weld fumes) cause extensive concern, confirmed that it has carcinogenesis in human body, also can cause other many health problems, as the hexavalent chromium compound that sucks some higher concentration can cause rhinorrhea, sneezes, itch, nosebleed, ulcer and perforation of nasal septum.The contact of short-term heavy dose, can produce adverse consequences in contact site, comprises that ulcer, schneiderian membrance stimulate and perforation of nasal septum.Take in damage that over much dosage can cause kidney and liver, feel sick, GI irritation, gastric ulcer, spasm be even dead.Skin contact can cause ulcer or allergic reaction, is Cr(VI) one of the easiest anaphylactic metal.In minimizing production and application, various pollutants are very important to the harm of human body.In order to guarantee the health of welding personnel, 2006 U.S. Occupational Safety and Health Administration (OSHA) newly promulgated Cr(VI in weld fumes) permission exposure limit value (PEL), by 52 original μ g/m
3be reduced to 3 μ g/m
3.
Stainless steel metal core welding wire is compared with the stainless steel solid core welding wire of current extensive application, stronger to the welding adaptability of various stainless steels, and composition and the ratio of adjusting medicine core are very convenient and easy, and desired weld seam chemical composition can be provided; Secondly, processing performance is good, and appearance of weld is attractive in appearance; Deposition rate is fast, and production efficiency is high, and under same weld electric current, the current density of metal core welding wire is large, and burn-off rate is fast.
Large quantity research shows: stainless steel metal core welding wire is compared with flux-cored wire, its weld fumes and Cr(VI) discharge capacity is less than flux-cored wire.In addition, current stainless flux-cored wire is mainly to do crust with stainless steel belt, make stainless steel welding stick, and rolling drawing process is complicated by rolling, drawing process, and the present invention adopts mild steel steel band, and not only cost is low, and manufacturing process is simple.Therefore, the present invention is a kind of high comprehensive performance, low Cr(VI) discharge capacity, 308 austenitic stainless steel metal core welding wires cheaply.
Summary of the invention:
In view of the foregoing, the present invention proposes a kind of low Cr(VI), low-cost 308 austenitic stainless steel metal core welding wires, it can be in the situation that guaranteeing that welding wire deposited metal mechanical property, decay resistance meet concerned countries standard-required, with mild steel steel band, replace stainless steel belt and further reduce costs, simplified manufacturing technique, compare with 308 austenitic stainless steel solid core welding wires, Cr(VI) discharge capacity can reduce by 30% ~ 40%, improved weld job environment, welding wire splashes little, moulding is attractive in appearance, weld seam high comprehensive performance.
For achieving the above object, a kind of low Cr(VI), 308 austenitic stainless steel metal core welding wires cheaply the present invention takes following technical scheme:, it is characterized in that metal core welding wire replaces stainless steel belt with mild steel steel band, welding wire traditional Chinese medicine powder chemical composition mass percent is as follows: C:0.03 ~ 0.065wt.%; Cr:52 ~ 58wt.%; Ni:26 ~ 30wt.%; Mn:4 ~ 6wt.%; Si:0.66 ~ 1.5wt.%; Ti:0.5 ~ 1wt.%; Zn:0.5 ~ 1wt.%; Zr:0.5 ~ 1 wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 26% ~ 38%.
Low Cr VI 308 austenitic stainless steel metal core welding wires, is characterized in that, in welding wire, crust is mild steel steel band, and in welding wire, metal-cored chemical composition mass percent is as follows: C:0.03 ~ 0.065wt.%; Cr:48 ~ 60 wt.%; Ni:24 ~ 32wt.%; Mn:4 ~ 7wt.%; Si:0.66 ~ 4wt.%; Ti:0.5 ~ 1.5wt.%; Zn:0.5 ~ 1.5wt.%; Zr:0.5 ~ 1.5wt.%; Fe: surplus.Filling rate is: 26 ~ 38%.
Further, in welding wire, metal-cored chemical composition mass percent is as follows: C:0.03 ~ 0.065wt.%; Cr:52 ~ 58wt.%; Ni:26 ~ 30wt.%; Mn:4 ~ 6wt.%; Si:0.66 ~ 1.5wt.%; Ti:0.5 ~ 1wt.%; Zn:0.5 ~ 1wt.%; Zr:0.5 ~ 1 wt.%; Fe: surplus.
Further, described metal core welding wire powder comprises: hafnium metal powfer: 40 ~ 120 orders, metal nickel powder: 40 ~ 120 orders, electrolytic manganese powder: 40 ~ 120 orders, 45 ferrosilicon powders: 60 ~ 120 orders, titanium-iron powder: 60 ~ 120 orders, metal zinc: 60 ~ 120 orders, zirconium ferrosilicon powder: 60 ~ 120 orders, metal iron powder: 60 ~ 120 orders.
The preparation method of described a kind of low Cr VI 308 austenitic stainless steel metal core welding wires; the carbon steel steel band that the steel band dimensions adopting is 16 ~ 8 * 0.6 ~ 0.3mm, passes through rolling, drawing, is processed into the gas shield stainless steel metal core welding wire that diameter is 0.9 ~ 1.6mm.
During this welding wire welding, protective gas is 95 ~ 98%Ar+2 ~ 5%O
2, gas flow rate 15 ~ 20L/min, DC reverse connection power supply; Welding condition is: voltage: 22 ~ 30V; Electric current: 140 ~ 260A; Wire feed rate: 350 ~ 500mm/min; Welding wire stretches out the distance of ignition tip: 14 ~ 25mm.
Further optimize welding procedure, welding condition is: voltage: 24 ~ 27V; Electric current 160 ~ 245A; Wire feed rate: 400 ~ 500mm/min; Air-flow velocity: 18 ~ 20L/min; Welding wire stretches out the distance of ignition tip: 18 ~ 22mm.
Weld heat input: 13 ~ 17KJ/cm; Interlayer temperature≤150 ℃.
In deposited metal, the content of each element is at following scope: C:0.02 ~ 0.065wt.%; Cr:19.2 ~ 22.3wt.%; Ni:9.1 ~ 12.0wt.%; Mn:1.2 ~ 2.6wt.%; Si:0.41 ~ 1.0wt.%; Ti:0.01 ~ 2.0wt.%; Zn:0.3 ~ 1.2wt.%; Zr:0.5 ~ 1.5wt.%; Fe: surplus.
The alloying element content scope forming in deposited metal is preferably as follows: C:0.02 ~ 0.065wt.%; Cr:19.5 ~ 22.0wt.%; Ni:9.5 ~ 11.5wt.%; Mn:1.51 ~ 2.5wt.%; Si:0.5 ~ 0.9wt.%; Ti:0.03 ~ 1.0wt.%; Zn:0.33 ~ 1.1wt.%; Zr:0.5 ~ 1.0wt.%Fe: surplus.
Main feature of the present invention is that metal core welding wire crust is mild steel steel band, has avoided the expensive of 304L stainless steel belt.Meanwhile, in not reducing medicine core, on the basis of Cr content, by adding Zn, Zr or its alloy, weld fumes amount is slightly low, Cr(VI in flue dust) discharge capacity reduction by 30% ~ 40%, in addition, in core wire, the element such as Si, Ti can reduce spatter.The stainless steel metal core welding wire made from the present invention has low Cr(VI), low cost, welding arc stablility, splash little, appearance of weld is attractive in appearance, the feature of high comprehensive performance.
Accompanying drawing explanation
(Ф 0.9,1.2,1.6mm) for the current/voltage scope of Fig. 1 austenitic stainless steel metal core welding wire
The specific embodiment
Metal core welding wire of the present invention is not subject to the restriction of following example, and the improvement in any scope of protecting at claim of the present invention and variation are all within protection scope of the present invention.
Selecting 16 ~ 8 * 0.6 ~ 0.3(width is 8 ~ 16mm, and thickness is 0.3 ~ 0.6mm) mild steel steel band be metal core welding wire crust, the existing U-shaped that rolled into.Crome metal powder, metallic nickel powder, electrolytic etching of metal manganese powder end, 45 silicon iron powders, ferrotianium powder, metallic zinc powder, zirconium ferrosilicon powder, metal iron powders etc. are configured to medicinal powder, and the granularity of the powder of getting is 40 ~ 120 orders.Got various powder are put into mixed powder machine and mix 40 minutes, then mixed-powder is added in U-shaped carbon steel trough of belt, filling rate is 26-38%, and U-lag is healed up, and makes medicinal powder parcel wherein.Then making it is respectively 2.4,2.26,1.96,1.83,1.73,1.6,1.5,1.41,1.34,1.26,1.19,1.09,0.9 wire drawing die by diameter, by road drawing, tube reducing, finally makes its diameter reach 0.9 ~ 1.6mm.
Specific embodiment is as follows:
1, low Cr VI 308 austenitic stainless steel metal core welding wires, in welding wire, chemical composition mass percent is: C:0.03wt.%; Cr:48wt.%; Ni:24wt.%; Mn:4wt.%; Si:0.66wt.%; Ti:0.5wt.%; Zn:0.5wt.%; Zr:0.5wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 26%.Adopt 95%Ar+5%O
2the welding condition of gas shielded arc welding is: voltage 25V; Electric current 210A; Wire feed rate 420mm/min; Gas flow rate 20L/min; Welding wire stretches out the distance 20mm of ignition tip, gage of wire 0.9mm.Adopt deposited metal composition prepared by above-mentioned technique to be: Cr:19.2wt.%; Ni:9.1wt.%; Mn:1.2wt.%; Si:0.41wt.%; Fe surplus.
2, low Cr(VI) 308 austenitic stainless steel metal core welding wires, in welding wire, chemical composition mass percent is: C:0.03wt.%; Cr:52wt.%; Ni:26wt.%; Mn:4wt.%; Si:0.66wt.%; Ti:0.5wt.%; Zn:0.5wt.%; Zr:0.5wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 28%.Adopt 96%Ar+4%O
2the welding condition of gas shielded arc welding is: voltage 25V; Electric current 200A; Wire feed rate 440mm/min; Gas flow rate 19L/min; Welding wire stretches out the distance 21mm of ignition tip, gage of wire 1.6.Adopt deposited metal composition prepared by above-mentioned technique to be: Cr:19.5wt.%; Ni:9.5wt.%; Mn:1.51wt.%; Si:0.5wt.%; Fe surplus.
3, low Cr(VI) 308 austenitic stainless steel metal core welding wires, in welding wire, chemical composition mass percent is: C:0.046wt.%; Cr:57wt.%; Ni:26wt.%; Mn:7wt.%; Si:2wt.%; Ti:0.5wt.%; Zn:0.5wt.%; Zr:1wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 32%.Adopt 98%Ar+2%O
2the welding condition of gas shielded arc welding is: voltage 26V; Electric current 220A; Wire feed rate 450mm/min; Gas flow rate 21L/min; Welding wire stretches out the distance 19mm of ignition tip, gage of wire 1.2mm.Adopt deposited metal composition prepared by above-mentioned technique to be: Cr:19.7wt.%; Ni:9.6wt.%; Mn:1.76wt.%; Si:0.7wt.%; Fe surplus.
4, low Cr(VI) 308 austenitic stainless steel metal core welding wires, in welding wire, chemical composition mass percent is: C:0.057wt.%; Cr:57wt.%; Ni:28wt.%; Mn:6wt.%; Si:1wt.%; Ti:1wt.%; Zn:0.5wt.%; Zr:0.5wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 30%.Adopt 97%Ar+3%O
2the welding condition of gas shielded arc welding is: voltage 28V; Electric current 230A; Wire feed rate 440mm/min; Gas flow rate 21L/min; Welding wire stretches out the distance 19mm of ignition tip, gage of wire 0.9mm.Adopt deposited metal composition prepared by above-mentioned technique to be: Cr:19.7wt.%; Ni:10wt.%; Mn:1.9wt.%; Si:0.9wt.%; Fe surplus.
5, low Cr(VI) 308 austenitic stainless steel metal core welding wires, in welding wire, chemical composition mass percent is: C:0.065wt.%; Cr:58wt.%; Ni:30wt.%; Mn:6wt.%; Si:1.5wt.%; Ti:1.0wt.%; Zn:1.0wt.%; Zr:1.0wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 34%.Adopt 96%Ar+4%O
2the welding condition of gas shielded arc welding is: voltage 29V; Electric current 220A; Wire feed rate 420mm/min; Gas flow rate 18L/min; Welding wire stretches out the distance 19mm of ignition tip, gage of wire 1.6mm.Adopt deposited metal composition prepared by above-mentioned technique to be: Cr:22.3wt.%; Ni:11.8wt.%; Mn:2.53wt.%; Si:1.0wt.%; Fe surplus.
6, low Cr(VI) 308 austenitic stainless steel metal core welding wires, in welding wire, chemical composition mass percent is: C:0.065wt.%; Cr:60wt.%; Ni:32wt.%; Mn:7wt.%; Si:2.0wt.%; Ti:1.5wt.%; Zn:1.5wt.%; Zr:1.5wt.%; Fe: surplus.The filling rate of medicinal powder in steel band is 36%.Adopt 98%Ar+2%O
2the welding condition of gas shielded arc welding is: voltage 26V; Electric current 210A; Wire feed rate 450mm/min; Gas flow rate 22L/min; Welding wire stretches out the distance 21mm of ignition tip, gage of wire 1.2mm.Adopt deposited metal composition prepared by above-mentioned technique to be: Cr:22wt.%; Ni:11.37wt.%; Mn:2.46wt.%; Si:0.9wt.%; Fe surplus.
Wherein best with embodiment 3.Technique effect: while adopting this welding wire welding, arc stability, splashes little, and flue dust is few, and all-position welding is good, and the tensile strength of its deposited metal is 570MPa, and percentage elongation is 38%, and Cr(VI) Reducing exhaust emission 40%.
Table 1 carbon steel band chemical composition scope (wt.%)
| Element | C | Si | Mn | S | P |
| Content (%) | 0.03-0.05 | <0.065 | <0.33 | <0.025 | <0.03 |
The low Cr(VI of table 2) 308 stainless steel metal core welding wire overall merits
1. probe temperature is-196 ℃.
2. sulfuric acid---copper sulfate test (Strauss experiment).
3. the weld fumes Cr(VI of 1-6# embodiment metal core welding wire in showing) content measuring value and 308 real cores, flux-cored wire weld fumes Cr(VI) content measuring value, according to ISO 16740, measure the Cr(VI in per unit weld fumes) discharge value
4. ⊙ represents well, and zero represents that generally △ represents slightly poor, and X represents defective.
Claims (6)
1. low Cr VI 308 austenitic stainless steel metal core welding wires, is characterized in that, in welding wire, crust is mild steel steel band, and in welding wire, metal-cored chemical composition mass percent is as follows: C:0.03～0.065wt.%; Cr:48～60wt.%; Ni:24～32wt.%; Mn:4～7wt.%; Si:0.66～4wt.%; Ti:0.5～1.5wt.%; Zn:0.5～1.5wt.%; Zr:0.5～1.5wt.%; Fe: surplus; Filling rate is: 26～38%.
2. according to welding wire claimed in claim 1, it is characterized in that, in welding wire, metal-cored chemical composition mass percent is as follows: C:0.03～0.065wt.%; Cr:52～58wt.%; Ni:26～30wt.%; Mn:4～6wt.%; Si:0.66～1.5wt.%; Ti:0.5～1wt.%; Zn:0.5～1wt.%; Zr:0.5～1wt.%; Fe: surplus.
3. according to welding wire claimed in claim 1, it is characterized in that, metal core welding wire powder comprises: hafnium metal powfer: 40～120 orders, metal nickel powder: 40～120 orders, electrolytic manganese powder: 40～120 orders, 45 ferrosilicon powders: 60～120 orders, titanium-iron powder: 60～120 orders, metal zinc: 60～120 orders, zirconium ferrosilicon powder: 60～120 orders, metal iron powder: 60～120 orders.
4. prepare the method for welding wire as claimed in claim 1, it is characterized in that:
Through shaping, rolling, drawing, waylay and rob, steel band is selected 16～8 * 0.6～0.3mm mild steel steel band, and finally obtaining diameter is the stainless steel metal core welding wire of 0.9～1.6mm.
5. apply the method for welding wire as claimed in claim 1, it is characterized in that:
Adopt 95～98%Ar+2～5%O
2the deposited hardfacing alloy technique of gas protection preparation, welding condition is: voltage: 22～30V; Electric current: 140～260A; Wire feed rate: 350～500mm/min; Gas flow rate: 15～20L/min; Welding wire stretches out the distance of ignition tip: 14～25mm.
6. according to application process claimed in claim 5, it is characterized in that: described welding condition is: voltage: 24～27V; Electric current: 160～245A; Wire feed rate: 400～500mm/min; Gas flow rate: 18～20L/min; Welding wire stretches out the distance of ignition tip: 18～22mm.
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| CN104668813B (en) * | 2015-02-12 | 2016-06-22 | 西安理工大学 | 17-4ph precipitation-hardening stainless steel flux-cored wire and preparation method thereof |
| US10799974B2 (en) | 2017-08-16 | 2020-10-13 | Lincoln Global, Inc. | Electrodes for forming austenitic and duplex steel weld metal |
| CN108941974A (en) * | 2018-09-11 | 2018-12-07 | 江苏思迪彼特新材料科技有限公司 | A kind of corrosion-resistant stainless steel arc welding flux cored wire and preparation method thereof |
| CN111660036B (en) * | 2020-05-21 | 2021-10-01 | 中国船舶重工集团公司第七二五研究所 | Low-apparent-density metal powder core seamless flux-cored wire |
| CN114505620B (en) * | 2022-04-19 | 2022-07-05 | 西安热工研究院有限公司 | Fe-Cr-Mn welding wire and preparation method and welding process thereof |
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Effective date of registration: 20160819 Address after: 213200 Jiangsu Changzhou Jintan District Xue Port Industrial Park Patentee after: Cowell welding (Jiangsu) Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology |